BirdAnalyst
Species · BCR 17 · BBS 2025 Release · 1966–2024

Greater Sage-Grouse In Badlands and Prairies

All regionsBadlands and PrairiesGeneralists

Greater Sage-Grouse in Badlands and Prairies has increased: up 34% on the route-weighted index since 1970.

+34%Since 1970TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
45Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
52YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Greater Sage-Grouse in Badlands and Prairies. See the full index history below.

Greater Sage-Grouse In Badlands and Prairies Population Forecast

If the recent trend holds, Greater Sage-Grouse in Badlands and Prairies is projected to fall about 49% by 2029 — from 0.21 in 2024 to a central estimate of 0.11 (95% range 0.00–0.89). A 5-year backtest shows a typical error of ±172.9%, with 100% of held-out values landing inside the 95% band.

-49%Change by 2029TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.11Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.8995% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±172.9%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Greater Sage-Grouse in Badlands and Prairies is projected to fall about 49% by 2029 — from 0.21 in 2024 to a central estimate of 0.11 (95% range 0.00–0.89). A 5-year backtest shows a typical error of ±172.9%, with 100% of held-out values landing inside the 95% band.19682029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20250.140.000.92
20260.130.000.91
20270.130.000.90
20280.120.000.89
20290.110.000.89

Routes In Badlands and Prairies

Routes recording Greater Sage-Grouse in Badlands and Prairies.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
GorhamNORTH-DAKOTA181997
MayoworthWYOMING142006
RoyMONTANA122021
ArvadaWYOMING82000
GlenrockWYOMING71974
IngomarMONTANA62024
WelchWYOMING61994
RozetWYOMING62017
SussexWYOMING52016
RavenWYOMING52024
JordanMONTANA42017
CircleMONTANA41977
ShawmutMONTANA41988
SchoonoverWYOMING42016
Thunder BasinWYOMING42018
PowdervilleMONTANA32024
Jordan SouthMONTANA32021
ClarkelenWYOMING31977
NatronaWYOMING31988
BillWYOMING31999
Teapot DomeWYOMING31989
St XavierMONTANA21988
HardingSOUTH-DAKOTA22012
WyarnoWYOMING22008
RecluseWYOMING22016

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.